// Formulaire conversion SURFACE
function conv_surface(){
	fm = document.form_surface;//Math.round(..)
	if((fm.a1.value!="")){
	fm.a2.value = Math.round((fm.a1.value * 10.764)*100)/100 ;
	fm.a3.value = Math.round((fm.a1.value * 1550.016)*100)/100 ;
	}
	if((fm.b2.value!="")){
	fm.b1.value = Math.round((fm.b2.value / 10.764)*1000)/1000 ;
	fm.b3.value = Math.round((fm.b2.value * 144)*100)/100 ;
	}
	if((fm.c3.value!="")){
	fm.c1.value = Math.round((fm.c3.value / 1550.016)*1000)/1000 ;
	fm.c2.value = Math.round((fm.c3.value / 144)*100)/100 ;
	}
	}
function pageFocus_surface(){
	document.form_surface.Button.focus();}
	
// Formulaire conversion LONGUEUR
function conv_longueur(){
	fm = document.form_longueur;//Math.round(..)
	if((fm.e1.value!="")){
	fm.e2.value = Math.round((fm.e1.value * 3.281)*100)/100 ;
	fm.e3.value = Math.round((fm.e1.value * 39.37)*100)/100 ;
	}
	if((fm.f2.value!="")){
	fm.f1.value = Math.round((fm.f2.value / 3.281)*1000)/1000 ;
	fm.f3.value = Math.round((fm.f2.value * 12)*100)/100 ;
	}
	if((fm.g3.value!="")){
	fm.g1.value = Math.round((fm.g3.value / 39.37)*1000)/1000 ;
	fm.g2.value = Math.round((fm.g3.value / 12)*100)/100 ;
	}
	}
function pageFocus_longueur(){
	document.form_longueur.Button.focus();}